JPS575476A - Pickup device - Google Patents

Pickup device

Info

Publication number
JPS575476A
JPS575476A JP7925780A JP7925780A JPS575476A JP S575476 A JPS575476 A JP S575476A JP 7925780 A JP7925780 A JP 7925780A JP 7925780 A JP7925780 A JP 7925780A JP S575476 A JPS575476 A JP S575476A
Authority
JP
Japan
Prior art keywords
signal
integration time
circuit
time
pickup
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP7925780A
Other languages
Japanese (ja)
Other versions
JPS6255754B2 (en
Inventor
Tokuichi Tsunekawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP7925780A priority Critical patent/JPS575476A/en
Priority to US06/269,804 priority patent/US4484223A/en
Publication of JPS575476A publication Critical patent/JPS575476A/en
Publication of JPS6255754B2 publication Critical patent/JPS6255754B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
    • H04N25/63—Noise processing, e.g. detecting, correcting, reducing or removing noise applied to dark current
    • H04N25/633—Noise processing, e.g. detecting, correcting, reducing or removing noise applied to dark current by using optical black pixels

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)

Abstract

PURPOSE:To keep excellent control of signal integraion time at all times, by providing a circuit to the signal integrating time of a solidstate pickup element controlled with an integrating time control circuit to reset in a shorter integration time for a special case. CONSTITUTION:A dark current signal and a scanning signal including said signal are sequentially produced from a solidstate pickup element SP, and a pickup signal is obtained by subtracting the dark current signal from the scanning signal with a differential circuit OP1 and the image signal integrating time is controlled with the integration time control circuit so as to reduce the pickup signal level to a given leve. Further, in the state that the signal integration time is set to the longest integration time possible for control with the integration time control circuit, when the level of the pickup signal from the differential circuit is lower than the lower limit of the specified level range, a reset circuit is provided to reset the signal integration time to be set with the integration time control circuit to the shorter integration time.
JP7925780A 1980-06-12 1980-06-12 Pickup device Granted JPS575476A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP7925780A JPS575476A (en) 1980-06-12 1980-06-12 Pickup device
US06/269,804 US4484223A (en) 1980-06-12 1981-06-03 Image sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7925780A JPS575476A (en) 1980-06-12 1980-06-12 Pickup device

Publications (2)

Publication Number Publication Date
JPS575476A true JPS575476A (en) 1982-01-12
JPS6255754B2 JPS6255754B2 (en) 1987-11-20

Family

ID=13684796

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7925780A Granted JPS575476A (en) 1980-06-12 1980-06-12 Pickup device

Country Status (1)

Country Link
JP (1) JPS575476A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5954384A (en) * 1982-09-22 1984-03-29 Fuji Photo Film Co Ltd Device for recording density information of photographic picture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5954384A (en) * 1982-09-22 1984-03-29 Fuji Photo Film Co Ltd Device for recording density information of photographic picture

Also Published As

Publication number Publication date
JPS6255754B2 (en) 1987-11-20

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